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Finding the Fourth Proportional to 208,659.78, 287,933.13 and 123,762.06

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Solution

The fourth proportional to 208,659.78, 287,933.13 and 123,762.06 is: 170,781.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,659.78 : 287,933.13 = 123,762.06 : x
  2. Step 2: Convert to fraction form
    208,659.78/287,933.13 = 123,762.06/x
  3. Step 3: Cross multiply
    208,659.78x = 287,933.13 × 123,762.06
  4. Step 4: Simplify right side
    208,659.78x = 35,635,197,311.05
  5. Step 5: Solve for x
    x = 35,635,197,311.05/208,659.78
  6. Step 6: Final answer
    x = 170,781.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.